初始化(1)pthread_mutex_t mutex = {THREAD_MUTEX_INITIALIZER}(2)int pthread_mutex_init(pthread_mutex_t restrict mutex, const pthread_mutexattr_t restrict attr) 请求OS为*mutex分配资源,并将flag设为"已开锁",queue设置为NULL. 释放资源int pthread_mutex_destroy([thread_mutex_t *mutex) 请求OS释放*...
1.销毁自旋锁 intpthread_spin_destroy(pthread_spinlock_t*);2.初始化自旋锁 intpthread_spin_init(pthread_spinlock_t*,int); 3.自旋锁上锁(阻塞)intpthread_spin_lock(pthread_spinlock_t*); 4.自旋锁上锁(非阻塞)intpthread_spin_trylock(pthread_spinlock_t*); 5.自旋锁解锁 intpthread_spin_unlock(pthr...
程序会这样一直循环。 #include<pthread.h>#include<unistd.h>#include<stdio.h>#include<stdlib.h>#include<semaphore.h>/* 静态方式初始化一个互斥锁用于保护共享资源*/staticpthread_mutex_tmutex = PTHREAD_MUTEX_INITIALIZER;/* 2个信号量控制块,一个表示资源空信号,一个表示资源满信号 */staticsem_tempty...
} pthread_mutex_t; 注意PTHREAD_MUTEX_INITIALIZER 是8个成员的结构体,与pthread_mutex_t定义相符。并且所有成为初始化为0。 初始化之后,我们接着看看pthread_mutex_lock操作: 1#ifndef __pthread_mutex_lock2strong_alias (__pthread_mutex_lock, pthread_mutex_lock)3hidden_def (__pthread_mutex_lock)4#end...
pthread_mutex_t mutex =PTHREAD_MUTEX_INITIALIZER; 另外锁可以用pthread_mutex_init函数动态的创建,函数原型如下: int pthread_mutex_init(pthread_mutex_t*mutex, const pthread_mutexattr_t * attr) 1.2 锁的属性 互斥锁属性可以由pthread_mutexattr_init(pthread_mutexattr_t *mattr)来初始化,然后可以调用其他...
{ __PTHREAD_SPIN_LOCK_INITIALIZER, __PTHREAD_SPIN_LOCK_INITIALIZER, 0, 0, 0, 0, 0, 0 } // mutex锁本质上是一个spin lock,空转锁,关于空转锁的东西在下面会提到。 /// pthread_src/sysdeps/generic/pt-mutex-init.c int _pthread_mutex_init (pthread...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 //先用互斥锁上锁pthread_mutex_lock(&mutex_t); ④ 解锁 : 代码语言:javascript 代码运行次数:0 运行 AI代码解释 //操作完毕后, 解锁pthread_mutex_unlock(&mutex_t); ⑤ 销毁互斥锁 : 代码语言:javascript ...
pthread_mutex_t blank_mutex = PTHREAD_MUTEX_INITIALIZER; memcpy(&g_mutex, &blank_mutex, sizeof(pthread_mutex_t)); 相关使用: 1:互斥锁加锁/解锁相关函数: pthread_mutex_lock(&g_mutex); //加锁 pthread_mutex_unlock(&g_mutex); //解锁 ...
# define __PTHREAD_MUTEX_INITIALIZER { __PTHREAD_SPIN_LOCK_INITIALIZER, __PTHREAD_SPIN_LOCK_INITIALIZER, 0, 0, 0, 0, 0, 0 } // mutex锁本质上是一个spin lock，空转锁，关于空转锁的东西在下面会提到。 /// pthread_src/sysdeps/generic/pt-mutex-init.c int _pthread_mutex_init (pth...
pthread_mutex_t mymutex = PTHREAD_MUTEX_INITIALIZER; Dynamically, with the pthread_mutex_init() routine. This method permits setting mutex object attributes, attr. The mutex is initially unlocked. The attr object is used to establish properties for the mutex object, and must be of type ...